Vehicle brake



lSeptI 21 1926. ,600,626

. c. M. FORD ET AL VEHICLE BRAKE v` Filed De@t 224 4 zsheeis-se' gfwuanom fr@ ZZ fadila,

Sept'. 21 1926. 1,600,626v c..M. FORD ET Al. l

VEHICLE BRAKE Filed D'eo, 2 2, '1924 2 sheets-sheet 2 k y i @swf/@iam any appropriate way to the side bar B opposite the braking surface of the rotor. The side plates 14 are held and properly braced, by a bolt 1G, which may, in some instances, serve as a stop, for rendering the braking` shoe limitaneously movable, in one direction, Extending between the side plates and ldisposed beneath the flattened horizontal portion of the brake shoe isa stop pin 17. This limits the downward swinging movement of the shoe, serves asa fulcrum therefor, and maintains it normally in the proper position, to permit free. rotation of the rotor, in the direction of the arrow G. seen that the vbrake shoe is not effective, while the rotor -is ltravelling with the propeller shaft, in the direction just named. lt is obvious, however, that should the rotor move in. a retrograde direction, as indicated by y the arrow H, then. the brake shoe will rock about the fulcruin pin 17 and take the ap-v proximate full line position, indicated in Figure @producing abraking action and immediately-stopping the rotary movement of the propellerl shaft. Thus,.-the vehicle will be brought to a standstill. During this action, it is also -clear that the-pintles or journals ofthe shoevwill travel upwardly in the arcuate slots 13, producing a cam action which will.` bind the ,shoe tightly against the rotor. It is desirable to provide means for swing'- ing the brake shoeclear of the braking surface of the rotor, so that the mechanism will not interfere with the rotation of thev propeller shaft, in thedirection of the arrow H, in any way, in case it is desired to purposely move the vehicle in a Yreverse direction. The means provided comprises a shoe lifting block 1S, detachably and adj ustably clamped on the end portion 19 of the Idiagonally disposed longitudinally `shiftable rod 20; rThe opposite endl of this rod is connected (in a manner not shown), with the gear shifting leverF. As better shown in Figure l, one corner of the upper `edge of the block is bevelled as at 21, and it is obvious that when the gear shifting lever is moved to reverse speed, the `inclined surface 2l of the block will ride beneath the brake shoe and lift it upwardly to. swing it' clear -of the rotor.

From the foregoing it will` be seen that we have evolved and produced a comparatively simple automatically acting device, acting in an effective manner as a brake for preventing retrograde motion of a vehicle, on a down grade, and that we have provided novel means, controlled by the gear lever, for temporarily rendering the improved device inoperative. ]t is thought, however, that the method of operation and the construction and-arrangement of details will be clear from the foregoing description, and drawings. For `this reason a more lengthy description is deemed unnecessary. Y

Thus, it will beV Although we have shown and described the preferred embodiment of the invention, we nevertheless wish it understood that any changes coming within the scope of the adjoined claims may be resorted to, if desired.

We claim:

l. ln a structure of the class described, a rotor having a braking surface, guide rollers disposed opposite the periphery of the rotor and riding upon said periphery, and a brakel shoe disposed opposite the braking surface of the rotor, for permitting unhampered movement ofthe same in` one direction, and for automatically preventing rotation inthe opposite direction.

2. ln a structure of the kclass described, a rotor having a braking surface, guide rollers ,disposed opposite the periphery of the rotor and riding upon said periphery, a brake shoe disposed opposite the braking surface of the rotor for permitting unhampered movement of the same in one direction vand for automatically preventing` the rotation in the opposite direction, and cam co-acting means active upon said shoe.

8. In a structure of the class described, a hub adapted tobe fixed upon a propellerv shaft, 'a rotor connected to saidV hub, said rotor having peripheral guide grooves, guide rollersl in association with said rotor and received in said grooves, a mounting, a brake shoe .in association with said mounting, said brake shoe having an arcuate sur face for contacting the braking surface of the rotor, said mounting being provided with cam slots, and said shoe having journals slidably mounted inV said slots.

4. In a structure of the class described, a hubadapted to be lined upOIl a propeller shaft, a rotor connected to saidhub, said rotor having peripherall guide grooves, guide rollers in association with said rotor and received in said grooves, a mounting, a brake shoe in association with said mounting, said brake shoe having an' arcuate surface for contacting the braking surface of the rotor, I

said mounting being provided with cam slots and said shoe having Journals ,slidably mounted in said slots, and means adapted ,to becontrolled by a gear shifting l lever for rendering said brake shoe entirely ineffective. l Y 1 5. A device of the class described comprising a rotor adapted to be ixedlymounted upon a propeller shaft, an automatically operable brake shoe cooperable with the braking surface of Vsaid rotor, mounting means for the shoe embodying a. combined stop and fnlcrum with which said shoe is cooperabldand cam, co-acting means between the shoe and the mounting.

6. A device of the class described comprising 'a rotor adapted to be iiXedly mounted upon a propeller shaft, an automatically operable brake shoe cooperable with the braking surface of said rotor, mounting means for the shoe embodying a combined stop and fulcrum with which said shoe is cooperable, and cam co-acting means between the shoe and the mounting, a lifting block disposed parallel to the axis about which said shoe fulcrunis, and a longitud inally shiftable rod upon which said blockis mounted, said block being adapted to move be-neath said shoe for lifting it upwardly to dispose lit in an inoperative position.

7. A struct-ure of the class described comprising a rotor adapted to be fiXedly mounted upon a propeller shaft7 said rotor having peripheral guide groovesbetween which is a brakmg surface, guide yrollers mounted opposite the periphery ofy the rotor and received in said grooves,V a mounting disposal on the opposite side of the rotor, a combined stop and fulcrum pin carried by said mounting7 va brake shoe in association With the mounting, said brake shoe having an arcuate surface for contacting the braking surface of the rotor, said mounting being provided With cam slots, and the shoe having journals slidable in said slot, a longitudinally shiftable rod disposed at right angles to the direction of movement of the shoe, and a lifting block carried by said rod and cooperable with said shoe.

In testimony whereof tures.

We aflix our signacEorL M. noun. WALTER Fox. 

